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MathGroup Archive 2007

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Re: 64 bit Kernel does not run on iMac Intel

  • To: mathgroup at smc.vnet.net
  • Subject: [mg80081] Re: 64 bit Kernel does not run on iMac Intel
  • From: BK <bkachler at hotmail.com>
  • Date: Sun, 12 Aug 2007 07:13:54 -0400 (EDT)
  • References: <200708101045.GAA14908@smc.vnet.net><f9jkk8$330$1@smc.vnet.net>

On Aug 11, 8:23 am, Brett Champion <bre... at wolfram.com> wrote:
> On Aug 10, 2007, at 5:45 AM , Bert Kachler wrote:
>
>
>
> > Hello,
>
> > I just obtained Mathematica 6.0.1 for MacOSX and
> > tried it out. For reasons explained in the FAQ,
> > the default kernel is a universal 32 bit binary,
> > and this works fine. Also included is a 64 bit kernel
> > for OSX/Intel, and it is also explained how to
> > substitute it.
>
> > However, it does not work, there seems to be
> > a problem with the architecture (Mac OSX version 10.4.10).
> > When running the MathKernel64 on the command line, it gives the
> > following error:
>
> > iMac.local:MacOS => MathKernel64
> > tcsh: MathKernel64: Bad CPU type in executable.
>
> > lipo tells me:
>
> > iMac.local:MacOS => lipo -detailed_info MathKernel64
> > input file MathKernel64 is not a fat file
> > Non-fat file: MathKernel64 is architecture: x86_64
>
> > while for the (universal) 32bit Kernel it says:
>
> > iMac.local:MacOS => lipo -detailed_info MathKernel
> > Fat header in: MathKernel
> > fat_magic 0xcafebabe
> > nfat_arch 2
> > architecture ppc
> >      cputype CPU_TYPE_POWERPC
> >      cpusubtype CPU_SUBTYPE_POWERPC_ALL
> >      offset 4096
> >      size 21676740
> >      align 2^12 (4096)
> > architecture i386
> >      cputype CPU_TYPE_I386
> >      cpusubtype CPU_SUBTYPE_I386_ALL
> >      offset 21684224
> >      size 25235608
> >      align 2^12 (4096)
>
> > So there seems to be an error in the architecture specification.
>
> > Any ideas?
>
> > Thanks!
>
> If you have a Core Duo based iMac (the original Intel-based versions)  
> then you can only use the 32-bit kernel.
>
> Core 2 Duo and the new Core 2 Extreme iMacs should be able to use the  
> 64-bit kernel.
>
> You can check your processor type by looking at "About this Mac"  
> under the Apple menu.
>
> Brett Champion
> Wolfram Research

Hi,

thanks for your quick answer!   I had forgotten to say that I use a
Core 2 Duo , supposedly supporting 64bit.

-Bert



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